Subtraction within 100 - Regrouping worksheet with 25 problems for practice.

Problem Description:

The task involves solving a series of subtraction problems within 100, where some problems require regrouping (borrowing). The goal is to subtract the second number from the first number in each pair and provide the correct answers.

Solution Approach:

1. Understand Subtraction with Regrouping:
- When subtracting, if the digit in the minuend (top number) is smaller than the corresponding digit in the subtrahend (bottom number), we need to borrow from the next higher place value.
- For example, in `44 - 37`, since `4` (units place of 44) is less than `7` (units place of 37), we borrow 1 from the tens place, making it `14 - 7 = 7` in the units place and `3 - 3 = 0` in the tens place.

2. Solve Each Problem Step-by-Step:
- Perform the subtraction for each pair of numbers, ensuring to handle regrouping when necessary.

Step-by-Step Solutions:

#### First Row:
1. 44 - 37:
- Borrow from the tens place: `14 - 7 = 7` (units place), `3 - 3 = 0` (tens place).
- Answer: 7

2. 53 - 26:
- Borrow from the tens place: `13 - 6 = 7` (units place), `4 - 2 = 2` (tens place).
- Answer: 27

3. 73 - 18:
- Borrow from the tens place: `13 - 8 = 5` (units place), `6 - 1 = 5` (tens place).
- Answer: 55

4. 52 - 49:
- Borrow from the tens place: `12 - 9 = 3` (units place), `4 - 4 = 0` (tens place).
- Answer: 3

5. 23 - 17:
- Borrow from the tens place: `13 - 7 = 6` (units place), `1 - 1 = 0` (tens place).
- Answer: 6

#### Second Row:
1. 63 - 27:
- Borrow from the tens place: `13 - 7 = 6` (units place), `5 - 2 = 3` (tens place).
- Answer: 36

2. 45 - 16:
- Borrow from the tens place: `15 - 6 = 9` (units place), `3 - 1 = 2` (tens place).
- Answer: 29

3. 96 - 77:
- Borrow from the tens place: `16 - 7 = 9` (units place), `8 - 7 = 1` (tens place).
- Answer: 19

4. 57 - 48:
- Borrow from the tens place: `17 - 8 = 9` (units place), `4 - 4 = 0` (tens place).
- Answer: 9

5. 61 - 19:
- Borrow from the tens place: `11 - 9 = 2` (units place), `5 - 1 = 4` (tens place).
- Answer: 42

#### Third Row:
1. 74 - 48:
- Borrow from the tens place: `14 - 8 = 6` (units place), `6 - 4 = 2` (tens place).
- Answer: 26

2. 53 - 25:
- Borrow from the tens place: `13 - 5 = 8` (units place), `4 - 2 = 2` (tens place).
- Answer: 28

3. 44 - 38:
- Borrow from the tens place: `14 - 8 = 6` (units place), `3 - 3 = 0` (tens place).
- Answer: 6

4. 32 - 27:
- Borrow from the tens place: `12 - 7 = 5` (units place), `2 - 2 = 0` (tens place).
- Answer: 5

5. 51 - 44:
- Borrow from the tens place: `11 - 4 = 7` (units place), `4 - 4 = 0` (tens place).
- Answer: 7

#### Fourth Row:
1. 32 - 28:
- Borrow from the tens place: `12 - 8 = 4` (units place), `2 - 2 = 0` (tens place).
- Answer: 4

2. 75 - 37:
- Borrow from the tens place: `15 - 7 = 8` (units place), `6 - 3 = 3` (tens place).
- Answer: 38

3. 72 - 59:
- Borrow from the tens place: `12 - 9 = 3` (units place), `6 - 5 = 1` (tens place).
- Answer: 13

4. 24 - 19:
- Borrow from the tens place: `14 - 9 = 5` (units place), `1 - 1 = 0` (tens place).
- Answer: 5

5. 65 - 17:
- Borrow from the tens place: `15 - 7 = 8` (units place), `5 - 1 = 4` (tens place).
- Answer: 48

#### Fifth Row:
1. 35 - 18:
- Borrow from the tens place: `15 - 8 = 7` (units place), `2 - 1 = 1` (tens place).
- Answer: 17

2. 53 - 39:
- Borrow from the tens place: `13 - 9 = 4` (units place), `4 - 3 = 1` (tens place).
- Answer: 14

3. 92 - 79:
- Borrow from the tens place: `12 - 9 = 3` (units place), `8 - 7 = 1` (tens place).
- Answer: 13

4. 54 - 46:
- Borrow from the tens place: `14 - 6 = 8` (units place), `4 - 4 = 0` (tens place).
- Answer: 8

5. 75 - 58:
- Borrow from the tens place: `15 - 8 = 7` (units place), `6 - 5 = 1` (tens place).
- Answer: 17

Final Answers:

```
7 27 55 3 6
36 29 19 9 42
26 28 6 5 7
4 38 13 5 48
17 14 13 8 17
```

Boxed Final Answer:

\[
\boxed{7, 27, 55, 3, 6, 36, 29, 19, 9, 42, 26, 28, 6, 5, 7, 4, 38, 13, 5, 48, 17, 14, 13, 8, 17}
\]